Since PSNR and SSIM values cannot guarantee a visually favorable result, we employ an additional metric for the final results, namely the information fidelity criterion (IFC) [1]}. Although IFC is scarcely used in literature [2]}, Yang et al. [3]} pointed out that IFC is correlated well with the human perception of SR images. As for PSNR and SSIM, higher IFC values indicate better results.
